Rotary engine.



\ Patented oct. 28, |902. T. P. BUTLER.

RUTARY ENGINE.

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` Hl ATTORNEYS 'UNITED STATES 'ATENT OFFICE.

THOMAS PEROY BUTLER, OF NEW YORK, N. Y.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent N o. 712,119, dated October 28, 1902.

Application led December 9. 1901. Serial No. 85,204. (No model.)

To all whom t may concern:

Be it known that I, THOMAS PnRoY BUT- LER, of the borough of Manhattan, city, county, and State of New York, have invented a new and useful Improvement'in Rotary Engines, of which the following is a specification.

I will describe a rotary engine embodying my improvement and then point out the novel features in the claims.

In the accompanying drawings, Figure l isr partly a central longitudinal section and partly an elevation of an engine embodying my improvement. Fig. 2 is a transverse section of the same, taken at the-dotted line 2 2, Fig. l. Fig. 3 is a transverse section of certain parts of the same, taken at the dotted line 3 3, Fig. l. Fig. lis a transverse section of certain parts, taken at the line 4 4, Fig. l. Fig. 5 is a transverse section of one of the parts, taken at the line 5 5, Fig. l..

Similar letters of reference designate corresponding parts in all'the figures.

A' A2 A3 designate the casing of the engine.

As here shown, it is of cylindrio form, and.

that will doubtless be the most desirable. The body A' is provided at its edges with flanges, which may be secured by bolts to the heads A2 A3. Inside the cylinder are secondary heads A4 A3, and these are located at considerable distance inward of the heads A2 A3, so that chambers B B2 will be formed between the headsf of each pair. The main heads A2 A3 are provided with inwardly-extending rims o. Between these rims and the body A of the casing -are annular spaces. The secondary heads A4 A5 abut against the inner ends of the rims d. The secondary heads A4 A5 have central openings, and projecting outwardly from these openings and preferably through the heads A2 A3 of the casing are cylinders a. have described are stationary.

The piston O of the engine is affixed to a shaft C', journaled in the cylinders d4, the latter being made to constitute bearings, which may be packed in any desired manner. The piston C has a body c', preferably made of cylindric form. A number of rib-coils c2 extend spirally around this body and, as here All the parts which I shown, continuously from end to end. Be-

tween these rib-coils are a number of partitions or abutments c3. Preferably these abut-- ments, which extend between the different rib-coils o2,will coincide. They are represented as so doing, and hence as forming other rib-coils c3, which intersect the spiral ribs c2.

The rib-.coils c2 and the abutments c3 are either formed integral with or fastened to the cylindric body c of the piston. In the abutments c3 are openings c4. Y

The numbers and proportions of the various parts may be modified according to the judgment of the constructor to meet different conditions and to adapt the engine to different purposes.

A cylindric shell c3 forms part of the piston and is secured to its rib-coils It extends into the space between the rims a of the heads A2 A3 and body A' of the casing.

Steam-pipes D D2 D3 supply steam to the chambers B B2. The pipe D' may communicate with either of the pipes D2 D3 under control of a valve D4. Steam, therefore, may be introduced into either of the chambers B' B2 for the purpose of causing rotation of the piston O in either direction. Openings b h2, formed in the secondary heads A4 A5, provide for the entrance of steam into the spaces between the rib-coils c2. Steam is exhausted from these spaces through either of two pipes E2 E3, which extend through the secondary heads A4 A3 and communicate with a pipe E' under control of a Valve E4. As shown, the valves D4 E4 are provided with handles, which are connected by a rod F, so that both Valves may be operated in unison.

When steam is admitted through the pip D2, it is exhausted through the pipe- E3, and when admitted through the pipe D3 it is-exhausted through the pipe E2.

The steam passes through the openingsc4 lin the abutments c3, and intermediate of adjacent abutments it acts upon the rib-coils c2.

As shown, the openings c4 in the abutments are at an angle to the faces of the abutments. The openings h b2 in the secondary heads. A4 A3 are also shown as being at an angle to the faces of these heads. The oblique disposition of the openings c4 gives them a tend- IOC ency to direct the steam against the ribcoils c2, and the oblique disposition of the openings b b2 gives the latter a tendency to direct steam against the faces of the abutments c3.

Vhile this engine is specially adapted for steam, it is not intended to restrict its use to that particular motive agent.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination with an internally-circular casing, of a rotary piston comprising a body or shaft, rib-coils extending spirally around said body or shaft, and abutments extending across the space between adjacent rib-coils and outwardly from said body or shaft, said abutments beingconstructed to provide openings.

2. The combination with an internally-circular casing, of a rotary piston comprising a body or shaft, rib-coils extending spirally around said body or shaft, and abutments extending across the space between adjacent rib-coils and outwardly from said body or shaft, said abutments being provided with openings extending outwardly from the body or shaft.

3. The combination with an internally-circular casing, of a rotary piston comprising a body or shaft, ribcoils extending spirally around said body or shaft, and abutments extending across the space between adjacent rib-coils and outwardly from said body or shaft, said abutments being provided with openings having oblique sides.

4. The combination with an internally-circular casing, of a rotary piston comprising a body or shaft, rib-coilsV extending spirally around said body or shaft, and other rib-coils extendingin the reverse direction around said body or shaft, openings being provided through one of the sets of rib-coils.

5. The combination with an internally-circular casing, of a rotary piston comprising a body or shaft, rib-coils extending spirally around said body or shaft, abutments extending across the space between adjacent ribs and outwardly from said body or shaft and constructed to provide openings, and an outer shell, all said parts being connected together to be rotated in unison. A

6. The combination with an internally-circular casing, two main heads and two secondary heads for said casing, constructed to form induction and eduction chambers forthe motive agent, of a rotary piston comprising a body or shaft, rib-coils extending spirally around said body or shaft, and abutments extending across the space between adjacent rib-coils and outwardly from said body or shaft and constructed to provide openings.

7. The combination with an internally-circular casing, two main heads and two secondary heads provided with oblique openings for said casing, and constructed with said main heads and casing to form induction and eduction chambers for the motive agent, of a rotary piston comprising a body or shaft, ribcoils extending spirally around said body or shaft, and abutments extending across the space between adjacent rib-coils and outwardly from said body or shaft and constructed to provide openings.

In testimony whereof I have signed my name to this specification in the presence ot' two subscribing Witnesses.

THOMAS PERCY BUTLER.

Witnesses:

N. T. M. MELLIN, M. U. OVERLAND. 

